低压二控三型TSC主电路投切闭锁问题分析  

Thyristors Latch-up Phenomenon in Two Control Three Type of TSC With Capacitor Banks Switched Repeatedly

作　　者：陈宗祥[1] 陈明星[1] 付子星 郭亚楠[1] CHEN Zong-xiang CHEN Ming-xing FU Zi-xing GUO Ya-nan(Anhui University of Technology, Ma＇ anshan 243000, Chin)

机构地区：[1]安徽工业大学,电气与信息工程学院,安徽马鞍山243000

出　　处：《电力电子技术》2017年第3期117-120,共4页Power Electronics

基　　金：国家自然科学基金(51277003)~~

摘　　要：基于电压过零投入、电流过零退出的二控三型晶闸管投切电容器(TSC)在重复投切过程中易发生晶闸管闭锁现象,通过建立TSC主电路的理想模型,详细分析了晶闸管闭锁现象的产生原因。结合实际可行性,提出了防闭锁控制方法。最后,综合主电路串联电抗器和电容器放电电阻的影响,对所提控制方法进行了仿真和实验验证。结果表明所提控制方法能有效避免晶闸管闭锁现象的发生,对提高二控三型TSC动态响应性能具有重要意义。Thyristor switched capacitor（TSC） is one of the most prevalent compensators, because it has some important advantages,such as low loss and low cost.However,two of the three controlled type TSC device commonly used in low voltage distribution network is prone to lock the thyristor.A detailed theoretical analysis of thyristor latch-up when capacitor banks of low voltage TSC switched repeatedly is presented.A control strategy is proposed to avoid the thyristor latch-up,and the response speed and reliability of the device are increased.Simulation and experimental results verify the theoretical analysis and show that the control strategy is feasible and efficient.

关 键 词：晶闸管投切电容器 晶闸管闭锁 重复投切 

分 类 号：TM53[电气工程—电器]